Osorno in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Osorno plotted against Los Lagos and Chile. The SNDi of new construction in Osorno peaked in 1991-2005, compared to Los Lagos which followed a zig-zag trend with an overall increase and Chile which followed a zig-zag trend with an overall increase. Most recently, Osorno's incremental SNDi fell from 3.5 to 3.19 between 1991-2005 and 2006-2020. In terms of the aggregate network, Osorno ranked 2nd out of 2 cities in Los Lagos and 23rd out of 38 in Chile as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Georgetown, Guyana
• Nabha, India
• Gallarate, Italy
• Dongliang, China
• Amassoma, Nigeria
• Kabirwala, Pakistan

In new street additions, Osorno built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Georgetown built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Dongliang fluctuated in its street-construction patterns. For the full network, Osorno became progressively more disconnected, while Georgetown became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Dongliang fluctuated in connectivity. Notably, Osorno had a more sprawly network than Dongliang in 1975 but the two have since reversed their relative ranking.